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1. Restart networking

sudo /etc/init.d/networking restart

2. Disable the "Support for Atheros 802.11 wireless LAN cards" on system/administration/Hardware Drivers, and reboot your box.
3. Restart

sudo reboot

That's it, Cheers! Still having problem follow the instructions here

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require 'hpricot'
require 'net/http'
require 'rio'

# Pass website url to be scraped
url = "www.funonrails.com"

# Define filename to store file locally
file = "temp.html"
# Save page locally
rio(url) < rio (file)

# Open page through hpricot
doc = Hpricot(open(file))

Apply hpricot library to get right contents

doc.at("div.pageTitle")
doc/"div.pageTitle"
doc.search("div.entry")
doc//"div.pageTitle"

Hpricot API Reference click here